You Know that's not what I'm saying. Also you must not have watched the Bulls or Thunder in the playoffs last season if you don't think that Jimmy Butler and Reggie Jackson were key to their success. Neither team would trade one of those guys for Tristan straight up.
Ok, let's just start with this: the entire premise is really, really stupid.
Of course Oklahoma City wouldn't trade Thompson for Jackson straight up when they already have Serge Ibaka and Westbrook has been oft-injured. Back-up PG is a HUGE need for them right now. Of course Chicago wouldn't trade Butler for Thompson straight up when they have zero other young SGs on the roster but have a glutiny of big men who aren't the most gifted offensively (and are paying them all big salaries).
What makes this measure you've come up with, team X wouldn't trade player Y for Thompson and thus Thompson was overdrafted, silly, is that there are a billion other things that come into play in whether or not a team would make a trade. 1) Does the player they would be trading away fit their roster better, regardless of whether or not he's a better player. This would be the case in both of the scenarios you just provided. 2) Do we already have guys on our roster that we are paying a substantial amount of money too that play the same position as the player we would hypothetically be trading for? 3) Are we trying to tank, win now..what's the overall plan here?
The Cavs wouldn't trade Tristan Thompson for Kemba Walker would they? Of course not, they have no need for him on this roster whatsoever, regardless of whether or not Kemba is a better player. And that matters when understanding the Cavs are trying to win. So fit is now more important.
The Rockets obviously wouldn't trade Parsons for Thompson, because Thompson doesn't come close to fitting what that team wants to do on offense. On the flip side, especially after the acquisition of Deng, the Cavs would never even make that offer.
You see, you've come up with a measuring stick that leaves out way to many variables to determine which player is "better."